Re: [COUPERS-TECH] model 415-CD history

[roger anderson]

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If any  aircraft  is modified with an STC, and that STC calls for the  data plate to be changed to reflect a  new model number,  then a new airworthiness certificate is needed.  If a new airworthiness certificate was not requested however (and it must be requested) , even though  the data plate was changed as required, then the FAA would consider that aircraft to be  the original model in their records.  However, the aircraft would have incorrect paperwork then since data plates and airworthiness certificates must match.  Also, aircraft can be changed by STCs that don't change the model number, such as an Aeronca Champ with a "no bounce" gear installed.  The Champ remains a 7AC and the 337 may or may not have  incresed its gross to 1400 lbs and outside the LSA range.  If it was increased although it's still a 7AC, it is no longer and never will be LSA.  Same with a Coupe.  Regardless of what the airworthiness certificate says, if a 337 was ever submitted after D changes were made and it reflects that the gross weight was increased to 1400 lbs, it is not now or will it ever be LSA.  Airworthiness certificates alone don't really mean anything.  roger

 

----- Original Message -----

From: Dan Brown

Cc: Ctech

Sent: Monday, September 25, 2006 7:59 AM

Subject: Re: [COUPERS-TECH] model 415-CD history

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Ed Burkhart Wrote:

Aircraft Specification A-787 explicitly allows all the postwar 415-C and 415-CD models to be converted to 415-D and be allowed the 1400 lb. gross weight limit.  Many have been converted but whether they were done “officially” is open to debate since many of these never got a new airworthiness certificate.

The FAA CD has an approved 337 dated 6/4/77 that states "Up graded A/C N-93932 Ercoupe 415C to 415D model by authority of Skyport Aircoupe Service & Ercoupe Service Memorandum SMK-1, SMK48, SMK46 & SMK-3XX"

The latest (7/17/56) Airworthiness Certificate in the file has the ship listed as a 415-C.  So it appears that there was not a new airworthiness certificate issued after the modification.

Where does that leave an pilot who needs to operate the ship as a LSA?  The C model is OK, but the D has a gross weight that puts it outside the LSA limits. 

Dan Brown
Annapolis, MD

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